The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2000
Filed:
Nov. 12, 1998
Applicant:
Inventors:
Minoru Kawada, Nishi-kasugai-gun, JP;
Mikihiko Ishii, Nishi-kasugai-gun, JP;
Assignee:
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417310 ;
Abstract
A compressor having a capacity-controlling mechanism is provided, by which the inner-peripheral surface of a blind opening provided in a piston is subjected to abrasion due to sliding and rotating motions of a coil spring in the piston. In the capacity-controlling mechanism, the coil spring is covered by a cover made of abrasion resistant material and the covered coil spring is arranged in the blind opening, or a head of the coil spring is engaged to an inner surface of the blind opening.